Other Calculators

Date, time, tip, unit conversion and other handy everyday calculators.

Age Calculator
Find your exact age in years, months and days, plus the total weeks, days and hours you have lived and your next birthday.
Concrete Calculator
Estimate how much concrete a slab, round column or set of stairs needs, including waste, bags and cost.
Date Calculator
Count the days between two dates, or add and subtract years, months and days from a date.
Fuel Cost Calculator
Estimate the fuel needed and the cost of a trip from distance, fuel economy and fuel price, and split it between passengers.
GPA Calculator
Calculate your grade point average on a 4.0 scale from your course grades and credits, with optional prior GPA.
Grade Calculator
Find your current course grade from weighted assignments and see the score you need on the final exam.
Hours Calculator
Work out hours worked between a start and end time, minus breaks, as hours:minutes and decimal hours, with optional pay.
IP Subnet Calculator
Calculate the network address, broadcast address, host range, subnet mask and usable hosts for any IPv4 address and prefix.
Password Generator
Generate strong random passwords in your browser with your choice of length and character types.
Time Calculator
Add or subtract two durations in days, hours, minutes and seconds and see the total in hours, minutes and seconds.
Tip Calculator
Work out the tip and the total bill, and split it evenly between any number of people.
Unit Converter
Convert between units of length, weight, temperature, area, volume, speed and time with a handy conversion table.